#include "libavutil/cpu.h"
#define LIBAVCODEC_VERSION_MAJOR 52
-#define LIBAVCODEC_VERSION_MINOR 110
+#define LIBAVCODEC_VERSION_MINOR 111
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
* Codec is able to deal with negative linesizes
*/
#define CODEC_CAP_NEG_LINESIZES 0x0800
+/**
+ * Codec supports frame-level multithreading.
+ */
+#define CODEC_CAP_FRAME_THREADS 0x1000
//The following defines may change, don't expect compatibility if you use them.
#define MB_TYPE_INTRA4x4 0x0001
int64_t pkt_dts;\
\
/**\
+ * the AVCodecContext which ff_thread_get_buffer() was last called on\
+ * - encoding: Set by libavcodec.\
+ * - decoding: Set by libavcodec.\
+ */\
+ struct AVCodecContext *owner;\
+\
+ /**\
+ * used by multithreading to store frame-specific info\
+ * - encoding: Set by libavcodec.\
+ * - decoding: Set by libavcodec.\
+ */\
+ void *thread_opaque;\
+\
+ /**\
* frame timestamp estimated using various heuristics, in stream time base\
* - encoding: unused\
* - decoding: set by libavcodec, read by user.\
* decoder to draw a horizontal band. It improves cache usage. Not
* all codecs can do that. You must check the codec capabilities
* beforehand.
+ * When multithreading is used, it may be called from multiple threads
+ * at the same time; threads might draw different parts of the same AVFrame,
+ * or multiple AVFrames, and there is no guarantee that slices will be drawn
+ * in order.
* The function is also used by hardware acceleration APIs.
* It is called at least once during frame decoding to pass
* the data needed for hardware render.
* if CODEC_CAP_DR1 is not set then get_buffer() must call
* avcodec_default_get_buffer() instead of providing buffers allocated by
* some other means.
+ * If frame multithreading is used and thread_safe_callbacks is set,
+ * it may be called from a different thread, but not from more than one at once.
+ * Does not need to be reentrant.
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*/
* Called to release buffers which were allocated with get_buffer.
* A released buffer can be reused in get_buffer().
* pic.data[*] must be set to NULL.
+ * May be called from a different thread if frame multithreading is used,
+ * but not by more than one thread at once, so does not need to be reentrant.
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*/
#define FF_DEBUG_VIS_QP 0x00002000
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
#define FF_DEBUG_BUFFERS 0x00008000
+#define FF_DEBUG_THREADS 0x00010000
/**
* debug
AVPacket *pkt;
/**
+ * Whether this is a copy of the context which had init() called on it.
+ * This is used by multithreading - shared tables and picture pointers
+ * should be freed from the original context only.
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by libavcodec.
+ */
+ int is_copy;
+
+ /**
+ * Which multithreading methods to use.
+ * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
+ * so clients which cannot provide future frames should not use it.
+ *
+ * - encoding: Set by user, otherwise the default is used.
+ * - decoding: Set by user, otherwise the default is used.
+ */
+ int thread_type;
+#define FF_THREAD_FRAME 1 //< Decode more than one frame at once
+#define FF_THREAD_SLICE 2 //< Decode more than one part of a single frame at once
+
+ /**
+ * Which multithreading methods are in use by the codec.
+ * - encoding: Set by libavcodec.
+ * - decoding: Set by libavcodec.
+ */
+ int active_thread_type;
+
+ /**
+ * Set by the client if its custom get_buffer() callback can be called
+ * from another thread, which allows faster multithreaded decoding.
+ * draw_horiz_band() will be called from other threads regardless of this setting.
+ * Ignored if the default get_buffer() is used.
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ int thread_safe_callbacks;
+
+ /**
* Current statistics for PTS correction.
* - decoding: maintained and used by libavcodec
* - encoding: unused
uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
AVClass *priv_class; ///< AVClass for the private context
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
+
+ /**
+ * @defgroup framethreading Frame-level threading support functions.
+ * @{
+ */
+ /**
+ * If defined, called on thread contexts when they are created.
+ * If the codec allocates writable tables in init(), re-allocate them here.
+ * priv_data will be set to a copy of the original.
+ */
+ int (*init_thread_copy)(AVCodecContext *);
+ /**
+ * Copy necessary context variables from a previous thread context to the current one.
+ * If not defined, the next thread will start automatically; otherwise, the codec
+ * must call ff_thread_finish_setup().
+ *
+ * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
+ */
+ int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
+ /** @} */
} AVCodec;
/**
/*
* Copyright (c) 2004 Roman Shaposhnik
+ * Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com)
*
* Many thanks to Steven M. Schultz for providing clever ideas and
* to Michael Niedermayer <michaelni@gmx.at> for writing initial
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+/**
+ * @file
+ * Multithreading support functions
+ * @see doc/multithreading.txt
+ */
+
#include <pthread.h>
#include "avcodec.h"
+#include "thread.h"
typedef int (action_func)(AVCodecContext *c, void *arg);
typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
int done;
} ThreadContext;
+/// Max number of frame buffers that can be allocated when using frame threads.
+#define MAX_BUFFERS 32
+
+/**
+ * Context used by codec threads and stored in their AVCodecContext thread_opaque.
+ */
+typedef struct PerThreadContext {
+ struct FrameThreadContext *parent;
+
+ pthread_t thread;
+ pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread.
+ pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change.
+ pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish.
+
+ pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext.
+ pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
+
+ AVCodecContext *avctx; ///< Context used to decode packets passed to this thread.
+
+ AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding).
+ int allocated_buf_size; ///< Size allocated for avpkt.data
+
+ AVFrame frame; ///< Output frame (for decoding) or input (for encoding).
+ int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
+ int result; ///< The result of the last codec decode/encode() call.
+
+ enum {
+ STATE_INPUT_READY, ///< Set when the thread is awaiting a packet.
+ STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup().
+ STATE_GET_BUFFER, /**<
+ * Set when the codec calls get_buffer().
+ * State is returned to STATE_SETTING_UP afterwards.
+ */
+ STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup().
+ } state;
+
+ /**
+ * Array of frames passed to ff_thread_release_buffer().
+ * Frames are released after all threads referencing them are finished.
+ */
+ AVFrame released_buffers[MAX_BUFFERS];
+ int num_released_buffers;
+
+ /**
+ * Array of progress values used by ff_thread_get_buffer().
+ */
+ int progress[MAX_BUFFERS][2];
+ uint8_t progress_used[MAX_BUFFERS];
+
+ AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
+} PerThreadContext;
+
+/**
+ * Context stored in the client AVCodecContext thread_opaque.
+ */
+typedef struct FrameThreadContext {
+ PerThreadContext *threads; ///< The contexts for each thread.
+ PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
+
+ pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer().
+
+ int next_decoding; ///< The next context to submit a packet to.
+ int next_finished; ///< The next context to return output from.
+
+ int delaying; /**<
+ * Set for the first N packets, where N is the number of threads.
+ * While it is set, ff_thread_en/decode_frame won't return any results.
+ */
+
+ int die; ///< Set when threads should exit.
+} FrameThreadContext;
+
static void* attribute_align_arg worker(void *v)
{
AVCodecContext *avctx = v;
pthread_mutex_unlock(&c->current_job_lock);
}
-void avcodec_thread_free(AVCodecContext *avctx)
+static void thread_free(AVCodecContext *avctx)
{
ThreadContext *c = avctx->thread_opaque;
int i;
ThreadContext *c= avctx->thread_opaque;
int dummy_ret;
+ if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
+ return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
+
if (job_count <= 0)
return 0;
return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
}
-int avcodec_thread_init(AVCodecContext *avctx, int thread_count)
+static int thread_init(AVCodecContext *avctx)
{
int i;
ThreadContext *c;
-
- avctx->thread_count = thread_count;
+ int thread_count = avctx->thread_count;
if (thread_count <= 1)
return 0;
avctx->execute2 = avcodec_thread_execute2;
return 0;
}
+
+/**
+ * Codec worker thread.
+ *
+ * Automatically calls ff_thread_finish_setup() if the codec does
+ * not provide an update_thread_context method, or if the codec returns
+ * before calling it.
+ */
+static attribute_align_arg void *frame_worker_thread(void *arg)
+{
+ PerThreadContext *p = arg;
+ FrameThreadContext *fctx = p->parent;
+ AVCodecContext *avctx = p->avctx;
+ AVCodec *codec = avctx->codec;
+
+ while (1) {
+ if (p->state == STATE_INPUT_READY && !fctx->die) {
+ pthread_mutex_lock(&p->mutex);
+ while (p->state == STATE_INPUT_READY && !fctx->die)
+ pthread_cond_wait(&p->input_cond, &p->mutex);
+ pthread_mutex_unlock(&p->mutex);
+ }
+
+ if (fctx->die) break;
+
+ if (!codec->update_thread_context) ff_thread_finish_setup(avctx);
+
+ pthread_mutex_lock(&p->mutex);
+ avcodec_get_frame_defaults(&p->frame);
+ p->got_frame = 0;
+ p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
+
+ if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
+
+ p->state = STATE_INPUT_READY;
+
+ pthread_mutex_lock(&p->progress_mutex);
+ pthread_cond_signal(&p->output_cond);
+ pthread_mutex_unlock(&p->progress_mutex);
+
+ pthread_mutex_unlock(&p->mutex);
+ }
+
+ return NULL;
+}
+
+/**
+ * Updates the next thread's AVCodecContext with values from the reference thread's context.
+ *
+ * @param dst The destination context.
+ * @param src The source context.
+ * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
+ */
+static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
+{
+ int err = 0;
+
+ if (dst != src) {
+ dst->sub_id = src->sub_id;
+ dst->time_base = src->time_base;
+ dst->width = src->width;
+ dst->height = src->height;
+ dst->pix_fmt = src->pix_fmt;
+
+ dst->has_b_frames = src->has_b_frames;
+ dst->idct_algo = src->idct_algo;
+ dst->slice_count = src->slice_count;
+
+ dst->bits_per_coded_sample = src->bits_per_coded_sample;
+ dst->sample_aspect_ratio = src->sample_aspect_ratio;
+ dst->dtg_active_format = src->dtg_active_format;
+
+ dst->profile = src->profile;
+ dst->level = src->level;
+
+ dst->bits_per_raw_sample = src->bits_per_raw_sample;
+ dst->ticks_per_frame = src->ticks_per_frame;
+ dst->color_primaries = src->color_primaries;
+
+ dst->color_trc = src->color_trc;
+ dst->colorspace = src->colorspace;
+ dst->color_range = src->color_range;
+ dst->chroma_sample_location = src->chroma_sample_location;
+ }
+
+ if (for_user) {
+ dst->coded_frame = src->coded_frame;
+ dst->has_b_frames += src->thread_count - 1;
+ } else {
+ if (dst->codec->update_thread_context)
+ err = dst->codec->update_thread_context(dst, src);
+ }
+
+ return err;
+}
+
+/**
+ * Update the next thread's AVCodecContext with values set by the user.
+ *
+ * @param dst The destination context.
+ * @param src The source context.
+ */
+static void update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
+{
+#define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
+ dst->flags = src->flags;
+
+ dst->draw_horiz_band= src->draw_horiz_band;
+ dst->get_buffer = src->get_buffer;
+ dst->release_buffer = src->release_buffer;
+
+ dst->opaque = src->opaque;
+ dst->hurry_up = src->hurry_up;
+ dst->dsp_mask = src->dsp_mask;
+ dst->debug = src->debug;
+ dst->debug_mv = src->debug_mv;
+
+ dst->slice_flags = src->slice_flags;
+ dst->flags2 = src->flags2;
+
+ copy_fields(skip_loop_filter, bidir_refine);
+
+ dst->frame_number = src->frame_number;
+ dst->reordered_opaque = src->reordered_opaque;
+#undef copy_fields
+}
+
+static void free_progress(AVFrame *f)
+{
+ PerThreadContext *p = f->owner->thread_opaque;
+ int *progress = f->thread_opaque;
+
+ p->progress_used[(progress - p->progress[0]) / 2] = 0;
+}
+
+/// Releases the buffers that this decoding thread was the last user of.
+static void release_delayed_buffers(PerThreadContext *p)
+{
+ FrameThreadContext *fctx = p->parent;
+
+ while (p->num_released_buffers > 0) {
+ AVFrame *f = &p->released_buffers[--p->num_released_buffers];
+
+ pthread_mutex_lock(&fctx->buffer_mutex);
+ free_progress(f);
+ f->thread_opaque = NULL;
+
+ f->owner->release_buffer(f->owner, f);
+ pthread_mutex_unlock(&fctx->buffer_mutex);
+ }
+}
+
+static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
+{
+ FrameThreadContext *fctx = p->parent;
+ PerThreadContext *prev_thread = fctx->prev_thread;
+ AVCodec *codec = p->avctx->codec;
+ uint8_t *buf = p->avpkt.data;
+
+ if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
+
+ pthread_mutex_lock(&p->mutex);
+
+ release_delayed_buffers(p);
+
+ if (prev_thread) {
+ int err;
+ if (prev_thread->state == STATE_SETTING_UP) {
+ pthread_mutex_lock(&prev_thread->progress_mutex);
+ while (prev_thread->state == STATE_SETTING_UP)
+ pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
+ pthread_mutex_unlock(&prev_thread->progress_mutex);
+ }
+
+ err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
+ if (err) {
+ pthread_mutex_unlock(&p->mutex);
+ return err;
+ }
+ }
+
+ av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+ p->avpkt = *avpkt;
+ p->avpkt.data = buf;
+ memcpy(buf, avpkt->data, avpkt->size);
+ memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ p->state = STATE_SETTING_UP;
+ pthread_cond_signal(&p->input_cond);
+ pthread_mutex_unlock(&p->mutex);
+
+ /*
+ * If the client doesn't have a thread-safe get_buffer(),
+ * then decoding threads call back to the main thread,
+ * and it calls back to the client here.
+ */
+
+ if (!p->avctx->thread_safe_callbacks &&
+ p->avctx->get_buffer != avcodec_default_get_buffer) {
+ while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
+ pthread_mutex_lock(&p->progress_mutex);
+ while (p->state == STATE_SETTING_UP)
+ pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
+
+ if (p->state == STATE_GET_BUFFER) {
+ p->result = p->avctx->get_buffer(p->avctx, p->requested_frame);
+ p->state = STATE_SETTING_UP;
+ pthread_cond_signal(&p->progress_cond);
+ }
+ pthread_mutex_unlock(&p->progress_mutex);
+ }
+ }
+
+ fctx->prev_thread = p;
+
+ return 0;
+}
+
+int ff_thread_decode_frame(AVCodecContext *avctx,
+ AVFrame *picture, int *got_picture_ptr,
+ AVPacket *avpkt)
+{
+ FrameThreadContext *fctx = avctx->thread_opaque;
+ int finished = fctx->next_finished;
+ PerThreadContext *p;
+ int err;
+
+ /*
+ * Submit a packet to the next decoding thread.
+ */
+
+ p = &fctx->threads[fctx->next_decoding];
+ update_context_from_user(p->avctx, avctx);
+ err = submit_packet(p, avpkt);
+ if (err) return err;
+
+ fctx->next_decoding++;
+
+ /*
+ * If we're still receiving the initial packets, don't return a frame.
+ */
+
+ if (fctx->delaying && avpkt->size) {
+ if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
+
+ *got_picture_ptr=0;
+ return 0;
+ }
+
+ /*
+ * Return the next available frame from the oldest thread.
+ * If we're at the end of the stream, then we have to skip threads that
+ * didn't output a frame, because we don't want to accidentally signal
+ * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
+ */
+
+ do {
+ p = &fctx->threads[finished++];
+
+ if (p->state != STATE_INPUT_READY) {
+ pthread_mutex_lock(&p->progress_mutex);
+ while (p->state != STATE_INPUT_READY)
+ pthread_cond_wait(&p->output_cond, &p->progress_mutex);
+ pthread_mutex_unlock(&p->progress_mutex);
+ }
+
+ *picture = p->frame;
+ *got_picture_ptr = p->got_frame;
+ picture->pkt_dts = p->avpkt.dts;
+
+ /*
+ * A later call with avkpt->size == 0 may loop over all threads,
+ * including this one, searching for a frame to return before being
+ * stopped by the "finished != fctx->next_finished" condition.
+ * Make sure we don't mistakenly return the same frame again.
+ */
+ p->got_frame = 0;
+
+ if (finished >= avctx->thread_count) finished = 0;
+ } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
+
+ update_context_from_thread(avctx, p->avctx, 1);
+
+ if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
+
+ fctx->next_finished = finished;
+
+ return p->result;
+}
+
+void ff_thread_report_progress(AVFrame *f, int n, int field)
+{
+ PerThreadContext *p;
+ int *progress = f->thread_opaque;
+
+ if (!progress || progress[field] >= n) return;
+
+ p = f->owner->thread_opaque;
+
+ if (f->owner->debug&FF_DEBUG_THREADS)
+ av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
+
+ pthread_mutex_lock(&p->progress_mutex);
+ progress[field] = n;
+ pthread_cond_broadcast(&p->progress_cond);
+ pthread_mutex_unlock(&p->progress_mutex);
+}
+
+void ff_thread_await_progress(AVFrame *f, int n, int field)
+{
+ PerThreadContext *p;
+ int *progress = f->thread_opaque;
+
+ if (!progress || progress[field] >= n) return;
+
+ p = f->owner->thread_opaque;
+
+ if (f->owner->debug&FF_DEBUG_THREADS)
+ av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
+
+ pthread_mutex_lock(&p->progress_mutex);
+ while (progress[field] < n)
+ pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
+ pthread_mutex_unlock(&p->progress_mutex);
+}
+
+void ff_thread_finish_setup(AVCodecContext *avctx) {
+ PerThreadContext *p = avctx->thread_opaque;
+
+ if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
+
+ pthread_mutex_lock(&p->progress_mutex);
+ p->state = STATE_SETUP_FINISHED;
+ pthread_cond_broadcast(&p->progress_cond);
+ pthread_mutex_unlock(&p->progress_mutex);
+}
+
+/// Waits for all threads to finish.
+static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
+{
+ int i;
+
+ for (i = 0; i < thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+
+ if (p->state != STATE_INPUT_READY) {
+ pthread_mutex_lock(&p->progress_mutex);
+ while (p->state != STATE_INPUT_READY)
+ pthread_cond_wait(&p->output_cond, &p->progress_mutex);
+ pthread_mutex_unlock(&p->progress_mutex);
+ }
+ }
+}
+
+static void frame_thread_free(AVCodecContext *avctx, int thread_count)
+{
+ FrameThreadContext *fctx = avctx->thread_opaque;
+ AVCodec *codec = avctx->codec;
+ int i;
+
+ park_frame_worker_threads(fctx, thread_count);
+
+ if (fctx->prev_thread)
+ update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
+
+ fctx->die = 1;
+
+ for (i = 0; i < thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+
+ pthread_mutex_lock(&p->mutex);
+ pthread_cond_signal(&p->input_cond);
+ pthread_mutex_unlock(&p->mutex);
+
+ pthread_join(p->thread, NULL);
+
+ if (codec->close)
+ codec->close(p->avctx);
+
+ avctx->codec = NULL;
+
+ release_delayed_buffers(p);
+ }
+
+ for (i = 0; i < thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+
+ avcodec_default_free_buffers(p->avctx);
+
+ pthread_mutex_destroy(&p->mutex);
+ pthread_mutex_destroy(&p->progress_mutex);
+ pthread_cond_destroy(&p->input_cond);
+ pthread_cond_destroy(&p->progress_cond);
+ pthread_cond_destroy(&p->output_cond);
+ av_freep(&p->avpkt.data);
+
+ if (i)
+ av_freep(&p->avctx->priv_data);
+
+ av_freep(&p->avctx);
+ }
+
+ av_freep(&fctx->threads);
+ pthread_mutex_destroy(&fctx->buffer_mutex);
+ av_freep(&avctx->thread_opaque);
+}
+
+static int frame_thread_init(AVCodecContext *avctx)
+{
+ int thread_count = avctx->thread_count;
+ AVCodec *codec = avctx->codec;
+ AVCodecContext *src = avctx;
+ FrameThreadContext *fctx;
+ int i, err = 0;
+
+ avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
+
+ fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
+ pthread_mutex_init(&fctx->buffer_mutex, NULL);
+ fctx->delaying = 1;
+
+ for (i = 0; i < thread_count; i++) {
+ AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
+ PerThreadContext *p = &fctx->threads[i];
+
+ pthread_mutex_init(&p->mutex, NULL);
+ pthread_mutex_init(&p->progress_mutex, NULL);
+ pthread_cond_init(&p->input_cond, NULL);
+ pthread_cond_init(&p->progress_cond, NULL);
+ pthread_cond_init(&p->output_cond, NULL);
+
+ p->parent = fctx;
+ p->avctx = copy;
+
+ *copy = *src;
+ copy->thread_opaque = p;
+ copy->pkt = &p->avpkt;
+
+ if (!i) {
+ src = copy;
+
+ if (codec->init)
+ err = codec->init(copy);
+
+ update_context_from_thread(avctx, copy, 1);
+ } else {
+ copy->is_copy = 1;
+ copy->priv_data = av_malloc(codec->priv_data_size);
+ memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
+
+ if (codec->init_thread_copy)
+ err = codec->init_thread_copy(copy);
+ }
+
+ if (err) goto error;
+
+ pthread_create(&p->thread, NULL, frame_worker_thread, p);
+ }
+
+ return 0;
+
+error:
+ frame_thread_free(avctx, i+1);
+
+ return err;
+}
+
+void ff_thread_flush(AVCodecContext *avctx)
+{
+ FrameThreadContext *fctx = avctx->thread_opaque;
+
+ if (!avctx->thread_opaque) return;
+
+ park_frame_worker_threads(fctx, avctx->thread_count);
+
+ if (fctx->prev_thread)
+ update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0);
+
+ fctx->next_decoding = fctx->next_finished = 0;
+ fctx->delaying = 1;
+ fctx->prev_thread = NULL;
+}
+
+static int *allocate_progress(PerThreadContext *p)
+{
+ int i;
+
+ for (i = 0; i < MAX_BUFFERS; i++)
+ if (!p->progress_used[i]) break;
+
+ if (i == MAX_BUFFERS) {
+ av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n");
+ return NULL;
+ }
+
+ p->progress_used[i] = 1;
+
+ return p->progress[i];
+}
+
+int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
+{
+ PerThreadContext *p = avctx->thread_opaque;
+ int *progress, err;
+
+ f->owner = avctx;
+
+ if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
+ f->thread_opaque = NULL;
+ return avctx->get_buffer(avctx, f);
+ }
+
+ if (p->state != STATE_SETTING_UP) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
+ return -1;
+ }
+
+ pthread_mutex_lock(&p->parent->buffer_mutex);
+ f->thread_opaque = progress = allocate_progress(p);
+
+ if (!progress) {
+ pthread_mutex_unlock(&p->parent->buffer_mutex);
+ return -1;
+ }
+
+ progress[0] =
+ progress[1] = -1;
+
+ if (avctx->thread_safe_callbacks ||
+ avctx->get_buffer == avcodec_default_get_buffer) {
+ err = avctx->get_buffer(avctx, f);
+ } else {
+ p->requested_frame = f;
+ p->state = STATE_GET_BUFFER;
+ pthread_mutex_lock(&p->progress_mutex);
+ pthread_cond_signal(&p->progress_cond);
+
+ while (p->state != STATE_SETTING_UP)
+ pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
+
+ err = p->result;
+
+ pthread_mutex_unlock(&p->progress_mutex);
+ }
+
+ pthread_mutex_unlock(&p->parent->buffer_mutex);
+
+ /*
+ * Buffer age is difficult to keep track of between
+ * multiple threads, and the optimizations it allows
+ * are not worth the effort. It is disabled for now.
+ */
+ f->age = INT_MAX;
+
+ return err;
+}
+
+void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
+{
+ PerThreadContext *p = avctx->thread_opaque;
+
+ if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
+ avctx->release_buffer(avctx, f);
+ return;
+ }
+
+ if (p->num_released_buffers >= MAX_BUFFERS) {
+ av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n");
+ return;
+ }
+
+ if(avctx->debug & FF_DEBUG_BUFFERS)
+ av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p, %d buffers used\n",
+ f, f->owner->internal_buffer_count);
+
+ p->released_buffers[p->num_released_buffers++] = *f;
+ memset(f->data, 0, sizeof(f->data));
+}
+
+/**
+ * Set the threading algorithms used.
+ *
+ * Threading requires more than one thread.
+ * Frame threading requires entire frames to be passed to the codec,
+ * and introduces extra decoding delay, so is incompatible with low_delay.
+ *
+ * @param avctx The context.
+ */
+static void validate_thread_parameters(AVCodecContext *avctx)
+{
+ int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
+ && !(avctx->flags & CODEC_FLAG_TRUNCATED)
+ && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
+ && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
+ if (avctx->thread_count == 1) {
+ avctx->active_thread_type = 0;
+ } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
+ avctx->active_thread_type = FF_THREAD_FRAME;
+ } else {
+ avctx->active_thread_type = FF_THREAD_SLICE;
+ }
+}
+
+int avcodec_thread_init(AVCodecContext *avctx, int thread_count)
+{
+ if (avctx->thread_opaque) {
+ av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
+ return -1;
+ }
+
+ avctx->thread_count = FFMAX(1, thread_count);
+
+ if (avctx->codec) {
+ validate_thread_parameters(avctx);
+
+ if (avctx->active_thread_type&FF_THREAD_SLICE)
+ return thread_init(avctx);
+ else if (avctx->active_thread_type&FF_THREAD_FRAME)
+ return frame_thread_init(avctx);
+ }
+
+ return 0;
+}
+
+void avcodec_thread_free(AVCodecContext *avctx)
+{
+ if (avctx->active_thread_type&FF_THREAD_FRAME)
+ frame_thread_free(avctx, avctx->thread_count);
+ else
+ thread_free(avctx);
+}